I have cooked more than one power supply this way....I could draw you a schematic diagram illustrating why for certain power supply designs hooking up another voltage source is a bad idea.
That said, many, if not most, modern power supplies don't care, especially those designed to be paralleled paralleledn. But you should check with the manufacturer to be sure. On Apr 23, 2015 11:34 PM, "TJ Trout" <t...@voltbb.com> wrote: > I have a dc load that I need to power using a switching ac to dc power > supply but I also occasionally need to power the load from batteries, I was > planning to put the load, power supply and battery clamps in parallel, is > that a acceptable solution ? Can I power the load from battery and back > feed DC into the supply without damaging it? Would there be a significant > drain back into the supply? > > If this isn't ok, what's better solution? Diode ? SPDT switch ? > > The load is 50V 100A so that makes diodes and switches a challenge to > find. .. >
